Benjamin f



BI` F.' LEE.

Truss Bridge.

Patented yMarch 2, 1852'.

N, PEEns. Phaumagmpher. wnmingwn. D.C.

sATEs PATENT oEEIoE.

BENJAMIN F. LEE, OF NEW YORK, N. Y.

BRIDGING NAVIGABLE STREAMS.

Specification of Letters Patent No. 8,781, dated March 2, 1852.

To @7l whom it may concern:

Be it known that I, BENJAMIN F. LEE, oi the city, county, and State of New York, have invented a new and improved mode o accommodating the passage of vessels up and down rivers at the same moment that the rivers are crossed by railroad-cars or ordinary vehicles on bridges for the passage of rail or common roads, and thatthe following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, making part of this specication.

The nature of my invention consists in a new combination of bridge, canal, tunnel and road by means of which neither the passage of carriages or cars across rivers nor the passage of vessels up and down them is impeded for an instant, draw. bridges by this invention being rendered unnecessary.

In the accompanying drawing A is the canal B the tunnel C C C C roads to shorten routes from places between canal and river to those beyond canal, D, D,AD, D, D, D

common roads.

Any kind of a bridge may be built with ont a draw and I provide for thepassage of vessels by a canal A cut around one end of the bridge on one side of the river which canal begins at the river above the bridge and ends in the river below the bridge and for the passage of the cars, carriages, &c., I provide a tunnel B under this canal conveying the road from the bridge to the land beyond the canal which tunnel I Inake before the canal.

The descent of the train from the bridge under the tunnel and the ascent after passing under the tunnel may be accomplished on inclined planes in any manner deemed best as this makes no part of my invention.

What I claim as my invention and desire to secure by Letters Patent is The combination of canal A tunnel B bridge and road constructed and arranged substantially as above described.

BENN. F. LEE.

Witnesses:

CHAs. B. CHURCHILL, THOMAS MURRAY. 

